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Tsirkin" , Paolo Bonzini , Yiwei Zhang , Sergio Lopez Pascual Cc: Gert Wollny , qemu-devel@nongnu.org, Gurchetan Singh , Alyssa Ross , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Alex Deucher , Stefano Stabellini , =?UTF-8?q?Christian=20K=C3=B6nig?= , Xenia Ragiadakou , Honglei Huang , Julia Zhang , Chen Jiqian , Rob Clark , Robert Beckett Subject: [PATCH v21 13/18] docs/system: virtio-gpu: Document host/guest requirements Date: Mon, 2 Mar 2026 17:59:15 +0300 Message-ID: <20260302145920.735423-14-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260302145920.735423-1-dmitry.osipenko@collabora.com> References: <20260302145920.735423-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=136.143.188.112; envelope-from=dmitry.osipenko@collabora.com; helo=sender4-pp-f112.zoho.com X-Spam_score_int: -5 X-Spam_score: -0.6 X-Spam_bar: / X-Spam_report: (-0.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.968, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.495, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity dmitry.osipenko@collabora.com) X-ZM-MESSAGEID: 1772463847626158500 From: Alex Benn=C3=A9e This attempts to tidy up the VirtIO GPU documentation to make the list of requirements clearer. There are still a lot of moving parts and the distros have some catching up to do before this is all handled automatically. Signed-off-by: Alex Benn=C3=A9e Cc: Sergio Lopez Pascual Reviewed-by: Akihiko Odaki Acked-by: Pierre-Eric Pelloux-Prayer Reviewed-by: Yiwei Zhang Signed-off-by: Dmitry Osipenko [dmitry.osipenko@collabora.com: Extended and corrected doc] --- docs/system/devices/virtio/virtio-gpu.rst | 105 +++++++++++++++++++++- 1 file changed, 102 insertions(+), 3 deletions(-) diff --git a/docs/system/devices/virtio/virtio-gpu.rst b/docs/system/device= s/virtio/virtio-gpu.rst index ef5fb0401d5d..d05f8cb8e3f9 100644 --- a/docs/system/devices/virtio/virtio-gpu.rst +++ b/docs/system/devices/virtio/virtio-gpu.rst @@ -7,14 +7,28 @@ VirtIO GPU =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 This document explains the setup and usage of the virtio-gpu device. -The virtio-gpu device paravirtualizes the GPU and display controller. +The virtio-gpu device provides a GPU and display controller +paravirtualized using VirtIO. It supports a number of different modes +from simple 2D displays to fully accelerated 3D graphics. =20 -Linux kernel support --------------------- +Linux guest kernel support +-------------------------- =20 virtio-gpu requires a guest Linux kernel built with the ``CONFIG_DRM_VIRTIO_GPU`` option. =20 +3D acceleration +--------------- + +3D acceleration of a virtualized GPU is still an evolving field. +Depending on the 3D mode you are running you may need to override +distribution supplied libraries with more recent versions or enable +build options. There are a number of requirements the host must meet +to be able to be able to support guests. QEMU must be able to access the +host's GPU and for the best performance be able to reliably share GPU +memory with the guest. Details of 3D acceleration requirements are +described in a further sections. + QEMU virtio-gpu variants ------------------------ =20 @@ -67,8 +81,14 @@ intermediate representation is communicated to the host = and the `virglrenderer`_ library on the host translates the intermediate representation back to OpenGL API calls. =20 +By default OpenGL version on guest is limited to 4.3. In order to enable +OpenGL 4.6 support, virtio-gpu host blobs feature (``hostmem`` and ``blob= `` +fields) should be enabled. The ``hostmem`` field specifies the size of +virtio-gpu host memory window. This is typically between 256M and 8G. + .. parsed-literal:: -device virtio-gpu-gl + -device virtio-gpu-gl,hostmem=3D8G,blob=3Dtrue =20 .. _virgl: https://docs.mesa3d.org/drivers/virgl.html .. _Gallium3D: https://www.freedesktop.org/wiki/Software/gallium/ @@ -96,6 +116,67 @@ of virtio-gpu host memory window. This is typically bet= ween 256M and 8G. =20 .. _drm: https://gitlab.freedesktop.org/virgl/virglrenderer/-/tree/main/sr= c/drm =20 +.. list-table:: Linux Host Requirements + :header-rows: 1 + + * - Capability + - Kernel Version + - Libvirglrenderer Version + * - OpenGL pass-through + - Any Linux version compatible with QEMU if not using host blobs featu= re, + Linux 6.13+ otherwise + - 0.8.2+ + * - Vulkan pass-through + - Linux 6.13+ + - 1.0.0+ + * - AMDGPU DRM native context + - Linux 6.13+ + - 1.1.0+ + * - Freedreno DRM native context + - Linux 6.4+ + - 1.0.0+ + * - Intel i915 DRM native context + - Linux 6.13+ + - 1.3.0+ + * - Asahi DRM native context + - `Downstream version`_ of Asahi Linux kernel + - 1.2.0+ + * - Panfrost native context + - Linux 6.13+ + - 1.3.0+ + +.. _Downstream version: https://github.com/AsahiLinux/linux + +.. list-table:: Linux Guest Requirements + :header-rows: 1 + + * - Capability + - Kernel Version + - Mesa Version + * - OpenGL pass-through + - Any Linux version supporting virtio-gpu + - 16.0.0+ + * - Vulkan pass-through + - Linux 5.16+ + - 24.2.0+ + * - AMDGPU DRM native context + - Linux 6.14+ + - 25.0.0+ + * - Freedreno DRM native context + - Linux 6.14+ + - 23.1.0+ + * - Intel i915 DRM native context + - Linux 6.14+ + - 26.1.0+ + * - Asahi DRM native context + - Linux 6.14+ + - 24.2.0+ + * - Panfrost native context + - Linux 6.14+ + - `mr36814`_ + +.. _mr36814: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/368= 14 + virtio-gpu rutabaga ------------------- =20 @@ -135,3 +216,21 @@ Surfaceless is the default if ``wsi`` is not specified. .. _Wayland display passthrough: https://www.youtube.com/watch?v=3DOZJiHMt= IQ2M .. _gfxstream-enabled rutabaga: https://crosvm.dev/book/appendix/rutabaga_= gfx.html .. _guest Wayland proxy: https://crosvm.dev/book/devices/wayland.html + +.. list-table:: Linux Host Requirements + :header-rows: 1 + + * - Capability + - Kernel Version + * - Vulkan+Wayland pass-through + - Linux 6.13+ + +.. list-table:: Linux Guest Requirements + :header-rows: 1 + + * - Capability + - Kernel Version + - Mesa Version + * - Vulkan+Wayland pass-through + - Linux 5.16+ + - 24.3.0+ --=20 2.52.0